Safety-lock for gas-valves.



M. l. SVOBODA.

SAFETY LOCK FOR GAS VALVES.

APPLICATION FILED MAY 14, 1915.

1 1 5 1 34., Patented Aug. 24, 1915.

MIKE JaSVOBODA, OF CHICAGQILLINOIS.

SAFETY-LOCK Fort GAS-VALVES.

Specification of Letters Patent.

Patented Aug. 24, 1%15.

Application filed May 14, 1915. Serial No. 28,099.

To all whom it may concern Be it known that 1, MIKE J. SVOBODA, acitizen of the United States, residing at Chicago, in the county of(look, State of Illinois, have invented certain new and usefulImprovements in Safety-Locks for Gas Valves; and I do hereby declare thefollow ing to be a full, clear, and exact description of the invention,such will enable others, skilled in the art to which it appertains tomake and use, the same.

This invention relates to new and useful improvements in devices forlocking the valves of gas cocks against accidental displacement.

It is the object of the present invention to provide such a lockingmeans which may readily be associated with gas fixtures of the usual andconventional type whereby upon the valve beingturned to closingposition, said means will engage it an d positively lock it againstturning back to open position until said locking means is actuated to areleasing position.

It is further the object to so mount this locking member that anyaccidental move- .ment tending to turn the valve to. open position,cannot engage the locking member to move it to releasing position.

With the above and other objects and advantages in view, the inventionresides more particularly in the novel combination, formation andarrangement of parts as more fully described hereinafter and pointed outin the appended claims.

Reference is had to the accompanying drawings, wherein similarcharacters of reference designate corresponding parts throughout theseveral views, and in which:

Figure 1 shows the embodiment of the invention as applied to that typeof gas fixture'having the valves positioned adjacent the outer ends ofthe branch arms thereof; Fig. 2 shows the eu'ibodim'ent of the inventionas applied to that type of gas fixture having its valves positioned .atthe inner ends of the arms adjacent the main or supporting pipe; Fig. 3is a bottom plan View of the structure shown in Fig. 1 and Fig. 4: is aperspective view of the clamp used in connection with the presentdevice.

Referring now more particularly to the accompanying drawings, andparticularly to the embodiment of the inventionas illustr:1" ed in Fig.1,'5 designates one ofthe arms of a gas fixture having adjacent itsouter end a conventional valve including the casing 6 through whichextends the stem 7 carrying the finger piece 8 and provided with a pin 9which slide in a slot or recess 10 in the casing to limit movement ofthe valve in the usual manner. The improved locking means comprises aclamping portion includmg a pair of members 11 each having itsintermediate portion oppositely bowed to embrace the arm 5 and havingone end portion provided with a transverse groove 12 ooacting with thegroove of the other member to form an opening in which is disposed thelocking pawl 13 of the device. Clamping bolts 14 are passed through bothend portions of these members to securely clamp them on the arm, and,one of the bolts passes through the said opening and serves to pivotallyhold the pawl. The members are disposed in a horizontal plane, andconsequently the pawl swings horizontally and its engaging end isdownwardly oflset to eX- tend into the recess 10. The pawl is normallyurged intothis recess by a leaf spring 15 having one end secured to thegrip end of the pawl and bearing at its other end against the arm. Thuswhen the valve is turned to closingposition, the lug 9 engages the pawlwith a cam action and raises and as the lug moves to closing position,the pawl springs into the recess to lock the pin, and the valve cannotbe actuated to open position until the pawl has been gripped and movedto releasing position. As the pawl swings in a horizontal plane, it willnot be subjected to the possibility of being accidentally operated byengagement of any member therewith which might also actuate the valve.

In the structure shown in Fig. 2, the valves 16 are positioned too nearthe supporting pipe 17 of the fixture to permit this structure beingused, and in this instance the clan'iping members 11 are positionedoutwardly of the valves and the locking pawls 1.3 are extended inwardlytoward the valves and have their engaging ends provided with recesses l8to lockingly receive the pins 9, the end faces of these members beingbeveled at 19 to permit a cam action of the pins upon moving to aposition in which the valves are closed.

An exceedingly simple device has thus beem'provided which may be veryreadily attached to a gas fixture of the usual type and which willefliciently act to automatically lock the valves closed so that a personneed have no fear of the valves becoming accidentally open, as by theoperators hand accidentally moving it after having once turned thevalve.

What is claimed is l. A device of the class described comprising aclamping portion. adapted to engage a pipe arm, a locking pawl pivotedto said clamping portion and. adapted to swing in a horizon il plane andhaving its engaging end oil '0 engage the pin of a gas valve, and aspring secured to the pawl and adapted to engage said pipe arm to urgethe pawl to locking position.

device oi? the class described combrace a pipe and their end portionrecessed to form an opening, a locking pawl passed I through the openingand having one end olfset, clamping bolts passed through the ends ofsaid members, one of said bolts passing through the opening and engagingthe-pawl to pivotally secure it and a spring secured to the pawl forurging it tolocking relation.

In testimony whereof, I ailix my sigrla ture, in the presence of twowitnesses.

- MIKE J. SVOBODA Witnesses: I

STANIsLAvE J. D'voi-ziug, JOSEPH F. Hammer,

